This is a rough guide, consult your storage device manufacturer documentation.
ALUA is supported in some devices, but usually it's disabled by default.
To enable ALUA, the following options should be changed:
- EMC CLARiiON/VNX:
"Failover Mode" should be changed to "4".
- HPE 3PAR:
"Host:" should be changed to "Generic-ALUA Persona 2 (UARepLun, SESLun, ALUA)".
- Promise VTrak/Vess:
"LUN Affinity" and "ALUA" should be changed to "Enable", "Redundancy Type"
must be "Active-Active".
- LSI/Engenio/NetApp RDAC class, as NetApp SANtricity E/EF Series and OEM arrays:
"Select operating system:" should be changed to "Linux DM-MP (Kernel 3.10 or later)".
- NetApp ONTAP:
To check ALUA state: "igroup show -v <igroup_name>", and to enable ALUA:
"igroup set <igroup_name> alua yes".